New challenges ahead for Google

Google dominates internet searches with nearly 67% of the market, outranking its rivals and making it a leader in 'pay per click' advertising.

However the amount it can charge firms each time a user clicks on a link is falling, and as more and more people use the search engine on their smart phones, analysts are keen to see what it has to say about its search advertising revenue.

BBC links

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.